CN114709965A - Double-source motor pump - Google Patents

Abstract

The application discloses a double-source motor pump, which comprises a motor body, a steering oil pump and a shell arranged outside the steering oil pump, wherein the steering oil pump and the shell are fixed on the motor body; the shell and the steering oil pump are provided with a containing cavity, the containing cavity is communicated with the inside of the steering oil pump, and oil in the steering oil pump can enter the containing cavity. This application utilizes shell and holding chamber can effectively enlarge the heat radiating area when turning to oil pump fluid circulation, is favorable to reducing the system oil temperature of two source motor pumps, and simultaneously, the fluid of holding intracavity also can absorb the partial vibration when motor body moves to provide good vehicle driving environment, improve the life cycle of two source motor pumps.

Description

Double-source motor pump

Technical Field

The invention relates to the technical field of automobile equipment, in particular to a double-source motor pump.

Background

While new energy electric vehicles are continuously developed, higher requirements are also put forward on the safety and reliability of the whole vehicles.

The double-source motor pump in the steering system of the new energy vehicle in the market at present is in a double-source working mode, namely, the double-source motor is provided with two sets of windings of high voltage and low voltage. Under the normal mode, the high-voltage winding of the double-source motor works to provide steering power for the whole vehicle, the high-voltage winding is connected with a power battery of the whole vehicle, and the low-voltage winding is connected with a low-voltage battery. When the high-voltage system of the whole vehicle breaks down and cannot assist, the low-voltage power supply is connected to provide short-time emergency power-assisted steering.

Wherein, the dual source motor pump still is used for some system oil supplies in the whole car, for example front axle hydraulic system etc. and the dual source motor pump that prior art was gathered has following problem in the use:

1) the double-source motor pump has high noise during working loading, and the noise is sharp and harsh, so that subjective evaluation of a vehicle is difficult to accept.

2) When the whole vehicle is loaded and used, when a power supply is reversely connected, some wire harnesses or control chips of the vehicle can be burnt.

3) When the whole vehicle runs, some fault alarms can be caused, and the use of the vehicle is influenced.

Disclosure of Invention

In order to solve one of the technical problems, the invention provides a double-source motor pump.

The invention provides a double-source motor pump, comprising:

the steering oil pump and the shell are fixed on the motor body;

the shell with turn to and have the holding chamber between the oil pump, the holding chamber with turn to the inside intercommunication of oil pump, turn to the fluid in the oil pump can enter into in the holding chamber.

Wherein, above-mentioned double-source motor pump can also have following characteristics: the shell comprises an inner wall surface and an outer wall surface, and at least one sound insulation gap layer is arranged between the inner wall surface and the outer wall surface.

Wherein, above-mentioned double-source motor pump can also have following characteristics: air is filled in the sound insulation gap layer; alternatively, the first and second liquid crystal display panels may be,

the sound insulation gap layer is in a vacuum state; or

The sound insulation gap layer is filled with sound insulation materials; or alternatively

And nitrogen or inert gas is filled in the sound insulation gap layer.

Wherein, above-mentioned double-source motor pump can also have following characteristics: the shell comprises a shell oil inlet and a shell oil outlet, the steering oil pump comprises an oil pump oil inlet and an oil pump oil outlet, the shell oil inlet is communicated with the oil pump oil inlet, and the shell oil outlet is communicated with the oil pump oil outlet;

the shell further comprises an oil return port, and the oil return port is communicated with an external oil can.

Wherein, above-mentioned double-source motor pump can also have following characteristics: the shell is provided with a shell mounting hole, and the mounting hole is connected to the motor body through a connecting piece.

Wherein, above-mentioned double-source motor pump can also have following characteristics: the material of the housing comprises a non-metallic material.

Wherein, above-mentioned double-source motor pump can also have following characteristics: the double-source motor pump further comprises a low-voltage controller, the motor body comprises a low-voltage steering winding, the low-voltage controller is respectively connected with the power supply end and the low-voltage steering winding, the low-voltage controller comprises a cut-off module, and the cut-off module is used for cutting off electric energy generated by coupling of the low-voltage steering winding when the high-voltage steering winding operates.

Wherein, above-mentioned double-source motor pump can also have following characteristics: the low-voltage controller also comprises a cut-off control module, the cut-off control module is in communication connection with the cut-off module, and the cut-off module comprises a cut-off circuit; the low-voltage controller is used for sending a control signal, and the cutoff control module receives the control signal and indicates the cutoff circuit to be switched off or switched on.

Wherein, above-mentioned double-source motor pump can also have following characteristics: the cut-off circuit comprises a cut-off unit, and the cut-off unit comprises an NMOS tube or a relay.

Wherein, above-mentioned double-source motor pump can also have following characteristics: the cutoff circuit further comprises a voltage stabilizing diode, a first resistor and a second resistor;

the NMOS transistor comprises a source electrode, a grid electrode and a drain electrode;

the source electrode is electrically connected with the anode of the power supply end, the anode of the voltage stabilizing diode and one end of the first resistor respectively;

the grid is electrically connected with the cathode of the voltage stabilizing diode, the other end of the first resistor and one end of the second resistor respectively;

the drain electrode is electrically connected with the low-voltage steering winding;

and the other end of the second resistor is in communication connection with the truncation control module.

According to the double-source motor pump, the heat dissipation area of the steering oil pump during oil circulation can be effectively enlarged by utilizing the shell and the containing cavity, the system oil temperature of the double-source motor pump is favorably reduced, and meanwhile, the oil in the containing cavity can absorb part of vibration of the motor body during operation, so that a good vehicle driving environment is provided, and the service life of the double-source motor pump is prolonged.

Other characteristic features and advantages of the invention will become apparent from the following description of exemplary embodiments, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.

FIG. 1 is a schematic diagram of a dual source motor pump in an embodiment;

FIG. 2 is a sectional view of a casing of a pump of a dual source motor according to an embodiment;

FIG. 3 is a schematic view of a motor body of a dual source motor pump in an embodiment;

FIG. 4 is a schematic circuit diagram of a cut-off circuit in the dual source motor pump of the embodiment;

fig. 5 is a schematic circuit diagram of a cut-off unit in the dual source motor pump in the embodiment.

Reference numerals:

1. a motor body; 2. a steering oil pump; 3. a housing; 4. an accommodating cavity; 5. a low-voltage controller; 6. a power supply terminal; 7. a high voltage controller; 11. a low voltage steering winding; 12. a high voltage steering winding; 31. an inner wall surface; 32. an outer wall surface; 33. a sound-insulating gap layer; 34. an oil inlet of the shell; 35. a housing oil outlet; 36. an oil return port; 37. a housing mounting hole; 51. a truncation module; 52. a cut-off control module; 53. cutting off the circuit; 311. an annular plate; 312. a first plate; 313. a second plate; 331. a first gap; 332. a second gap; 531. a truncation unit; 532. a voltage regulator diode; 533. a first resistor; 534. a second resistor;

A. a control circuit; n1, source; n2, a gate; n3, drain electrode; p, control signal.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The invention aims to enlarge the heat dissipation area when oil in a steering oil pump circulates and reduce the system oil temperature of the double-source motor pump in the operation process of the double-source motor pump, and meanwhile, the oil in the containing cavity can also absorb part of vibration when the motor body operates, thereby avoiding generating sharp and harsh noise, improving and increasing the driving environment of a vehicle and prolonging the service cycle of the double-source motor pump.

The dual source motor pump provided according to the present disclosure is described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the dual source motor pump includes a motor body 1, a steering oil pump 2, and a casing 3 provided outside the steering oil pump 2.

The steering oil pump 2 is fixed to the motor body 1. The steering oil pump 2 can be fixed on the motor body 1 by a connecting piece. Wherein the connecting member may include a fixing bolt, etc. The input shaft end of the steering oil pump 2 is connected with the output shaft end of the motor body 1 so as to drive the steering oil pump 2 to rotate through the motor body 1. A metal sealing ring or an oil seal and the like can be arranged between the steering oil pump 2 and the motor body 1 to ensure the sealing performance between the steering oil pump 2 and the motor body 1.

The housing 3 may be fixed to the motor body 1 by a connector, which may include a fixing bolt or the like. Referring to fig. 1 and 2, the housing 3 is internally configured as an installation space in which the steering oil pump 2 is located, thereby forming an accommodation chamber 4 between the housing 3 and the steering oil pump 2. This holding chamber 4 and the inside intercommunication that turns to oil pump 2 turn to fluid in the oil pump 2 can enter into holding chamber 4 to can carry out fluid circulation in holding chamber 4, increase and turn to the route of fluid circulation in the oil pump 2.

In the embodiment, the accommodating cavity is utilized to increase the path of oil circulation in the steering oil pump, the heat dissipation area of the oil circulation is enlarged through the side wall of the shell, the system oil temperature during the carrying of the double-source motor pump can be reduced, and meanwhile, the oil in the accommodating cavity can also absorb partial vibration generated when the motor body runs, so that a good vehicle driving environment is provided, and the service cycle of the double-source motor pump is prolonged.

In some embodiments, as shown in fig. 2, the housing 3 includes an inner wall surface 31 and an outer wall surface 32. Wherein the outer wall surface 32 may be an outer side wall of the housing 3. The outer wall surface 32 and the inner wall surface 31 are disposed at a predetermined distance from each other, thereby forming a sound-deadening gap layer 33 between the inner wall surface 31 and the outer wall surface 32. The number of the sound-insulating gap layer 33 is at least one, and for example, the sound-insulating gap layer 33 may be two, three, or more than three layers.

When the dual-source motor pump in the prior art is in operation, such as a working state or a loading state, particularly when the dual-source motor pump is in the loading state, sharp and harsh noises are generated, and the noises make the evaluation of a driver on the main pipe of a vehicle unacceptable. In this embodiment, utilize the isolation interstitial layer 33 of at least one deck to improve the noise reduction and the noise insulation function of shell 3, another part vibration that is not absorbed by the fluid in the holding chamber 4 reaches the external world when effectively preventing the loading of motor body 1, and simultaneously, the cooperation holding chamber 4 of the interstitial layer 33 that gives sound insulation can optimize sharp-eared noise, reduce high frequency noise, eliminate sharp-eared sound, thereby solve sharp-eared noise problem, provide good driving environment for the navigating mate, improve navigating mate's driving comfort.

In one example, the inner wall surface 31 may include an annular plate 311, a first plate 312, and a second plate 313. The first plate 312 and the second plate 313 are used for closing two ends of the annular plate 311 along the extending direction of the output shaft end of the electrode body 1, the first plate 312 is provided with a mounting end surface 314 used for being connected with the motor body 1, the second plate 313 is arranged opposite to the first plate 312, and the second plate 313 is far away from the motor body 1.

The outer wall (i.e., the side facing the outer wall surface) of the annular plate 311 and the outer wall (i.e., the side facing the outer wall surface) of the first plate 312 together with the outer wall surface 32 form a sound-deadening gap layer 33, wherein the sound-deadening gap layer 33 may include a first gap 331 and a second gap 332. Referring to fig. 2, a distance between the outer wall of the second plate 313 and the outer wall surface 32 is defined as a second gap 332; the distance between the outer wall of the first plate 312 and the outer wall surface 32, and the distance between the outer wall of the annular plate 311 and the outer wall surface 32 are defined as a first gap 331. Wherein the width of the first gap 331 is different from the width of the second gap 332 in a direction parallel to the output axis of the motor body 1. Wherein the width range of the gap between the first gap 331 and the second gap 332 includes 1-4 mm. For example, in one embodiment, the first gap 331 and the second gap 332 have the same width, and the gap width is 2 mm.

When the motor body 1 is in a normal state or a loading state, vibration noise emitted by the motor body 1 is diffused along the periphery. When the motor body 1 is installed, the radial direction of the housing 3 is generally a vacant space, and noise which is not absorbed by the oil in the accommodating chamber 4 is transmitted to the outside of the housing 3 along the radial direction, so that the width of the gap (i.e. part of the first gap) in the radial direction of the housing 3 is increased, and the transmission of the noise along the radial direction is reduced. The accommodating chamber 4 is abutted against or fixedly connected to the motor body 1 toward the side of the motor body 1, and in order to reduce the influence of noise on the electrode body 1, the width of the gap (i.e., a part of the first gap) between the housing 3 and the motor body 1 needs to be increased. Noise in the direction of the motor body 1 toward the housing 3 is absorbed by the oil in the accommodating chamber 4, so that less noise can penetrate along the direction, and the width of the gap (i.e., the second gap) on the side away from the housing 3 of the motor body 1 can be reduced. Thus, in one example, the width of the second gap 332 is less than the width of the first gap 331.

Of course, the width of the second gap 332 may be larger than the width of the first gap 331, or the width of the second gap 332 may be equal to the width of the first gap 331.

Referring to fig. 2, in some embodiments, air may be filled in the sound-insulating gap layer 33 to absorb part of noise generated when the motor body 1 operates, and effectively reduce the noise emission, thereby improving the sound-insulating and noise-reducing effects of the casing 3.

Alternatively, the sound-deadening gap layer 33 is subjected to vacuum processing so that the inside of the sound-deadening gap layer 33 is in a vacuum state. The sound insulation gap layer 33 in the vacuum state is matched with a circulating channel in the accommodating cavity 4, so that sharp and harsh noise generated by the working or loading state of the double-source motor pump is optimized, the problem of the sharp and harsh noise is solved in the ear sense, and the driving comfort of a driver is improved.

Alternatively, the soundproof gap layer 33 is filled with a soundproof material such as soundproof cotton, rock wool, or the like. The sound insulation material is utilized to improve the noise insulation and reduction effect of the shell 3.

Further alternatively, the sound-deadening gap layer 33 is filled with nitrogen gas or inert gas. The inert gas may include, but is not limited to, helium, neon, argon, radon, and the like. The inert gas may also be a mixed gas of a plurality of gases, or other gases with inactive chemical properties at normal temperature and moderate temperature may also be used, for example, nitrogen is used as the sound insulation filling material, wherein the moderate temperature range may be understood to be 60-120 ℃.

Referring to FIG. 2, in some embodiments, housing 3 includes a housing oil inlet 34 and a housing oil outlet 35. Wherein the housing oil inlet 34 is provided on the top surface of the housing 3. The housing oil outlet 35 is disposed on the side wall of the housing 3, and a height difference is provided between the housing oil outlet 35 and the housing oil inlet 34, so as to facilitate the subsequent circulation of oil in the oil circulation channel formed in the housing 3. One end of the housing oil outlet 35 penetrates through the sound insulation gap layer 33 and then extends into the accommodating cavity 4.

The steering oil pump 2 includes an oil pump oil inlet (not shown) and an oil pump oil outlet (not shown). Wherein, shell oil inlet 34 and oil pump oil inlet intercommunication, shell oil-out 35 and oil pump oil-out intercommunication, form the circulating channel of fuel feeding liquid circulation, when turning to the fluid in oil pump 2 and carrying out the fluid circulation in circulating channel, the heat radiating area of fluid has effectively been increased, thereby reduce the oil temperature in the fluid circulation system, and simultaneously, the part vibration that dual source motor pump produced can also be absorbed to fluid among the circulating channel, and then optimize the sharp-pointed harsh noise that the vibration arouses, reduce the high frequency noise, improve navigating mate's comfort.

An oil return port 36 is further included on the housing 3, and the oil return port 36 is communicated with an external oil can (not shown). The oil return port 36 is located at the top end of the outer wall surface 32.

It should be noted that the housing oil inlet 34, the housing oil outlet 35 and the steering oil pump 2 are sealed by a sealing element (such as a metal sealing ring or an oil seal).

In some embodiments, as shown in fig. 2, the housing 3 is provided with a housing mounting hole 37. The housing mounting hole 37 has a flange end face, and when the housing 3 is mounted, the flange end face is fitted to the flange face of the steering oil pump 2 after the mounting hole 37 passes through the output shaft of the electrode body 1, and then the steering oil pump 2 and the housing 3 are mounted on the flange face of the motor body 1 by fasteners such as bolts. The installation of the double-source motor pump can be rapidly and conveniently completed by utilizing the shell installation hole 37, and meanwhile, the maintenance of the double-source motor pump is also convenient.

As shown in fig. 2, in some embodiments, the material of the housing 3 may include, but is not limited to, non-metallic materials including nylon, resin, and the like. The housing 3 includes an outer wall surface 32 and an inner wall surface 31, wherein the material of the outer wall surface 32 may be the same as the material of the inner wall surface 31, or the material of the outer wall surface 32 may be different from the material of the inner wall surface 31.

In this embodiment, the material of the outer wall surface 32 is the same as that of the inner wall surface 31, so as to reduce the manufacturing difficulty and the production cost of the housing 3.

As shown in fig. 3, in some embodiments, the motor body 1 includes a low-voltage steering winding 11, and meanwhile, a high-voltage steering winding 12 is further disposed inside the motor body 1 to implement dual-source control, where the operation of the high-voltage steering winding 12 is controlled by the high-voltage controller 7, it should be noted that the control logic operation of the high-voltage controller 7 may be implemented by using the prior art. The high-voltage steering winding 12 and the low-voltage steering winding 11 are arranged at intervals, wherein the high-voltage steering winding 12 is a main winding and is used for providing steering power assistance when a vehicle runs normally. When the vehicle is running normally, the low-voltage steering winding 11 is operated in a low power output state, or the low-voltage steering winding 11 is in a standby state. When the high-voltage steering winding 12 operates abnormally, the low-voltage steering winding 11 intervenes and provides short-time emergency power-assisted steering so that a fault vehicle runs to a safe position, and the safety of a driver is effectively guaranteed.

Referring to fig. 3, the dual source motor pump of the present embodiment further includes a low-pressure controller 5. The low voltage controller 5 is connected to the supply terminal 6 and the low voltage steering winding 11, respectively. The low-voltage controller 5 comprises a cutoff module 51, and the cutoff module 51 is used for cutting off electric energy generated by coupling of the low-voltage steering winding 11 when the high-voltage steering winding 12 operates, and plays a certain function of preventing reverse connection of a circuit, so that the service cycle of the dual-source motor pump is prolonged.

It should be noted that the power supply terminal 6 includes a power supply module, wherein the power supply module is provided with a high-voltage power supply module, a low-voltage power supply module, and a main power supply module. The high voltage power supply module is used for providing electric energy for the high voltage steering winding 12, the low voltage power supply module is used for providing electric energy for the low voltage steering winding 11, and the main power supply module can be used for providing electric energy for other equipment in the dual-source motor pump. The power supply module can include but not limited to storage battery, lead-acid battery or lithium cell etc. still can set up the module of charging among the power supply module to charge power supply module through external power cord, improve the life cycle and the efficiency of dual-source motor pump.

As shown in fig. 4, in some embodiments, the low pressure controller 5 further includes a cut-off control module 52. The truncation control module 52 is communicatively coupled to the truncation module 51. A cutoff circuit 53 is provided in the cutoff module 51. The low voltage controller 5 is configured to send a control signal P, and the cutoff control module 52 receives the control signal P and instructs the cutoff circuit 53 to turn off or on.

The cutoff circuit 53 is electrically connected to a control circuit a of the motor body 1, and the control circuit a is used for controlling the low-voltage steering winding 11 and/or the high-voltage steering winding 12. That is, the control circuit a of the motor body 1 may be connected downstream of the cutoff circuit 53, and the cutoff circuit 53 may be provided in the positive line or the negative line in the control circuit a of the motor body 1, as a load of the cutoff circuit 53.

In this application, through cutting off circuit 53 in the module 51, can effectively prevent when high pressure turns to winding 12, the coupling low pressure turns to the charging energy that winding 11 produced, also can act as the guard action of preventing joining conversely in the circuit simultaneously to prevent to take place because of the problem that pencil or control chip etc. that the power reversal leads to burn out, improve whole car energy consumption utilization and stability and security when the vehicle moves.

As shown in fig. 5, the cutoff circuit 53 includes a cutoff unit 531, wherein the cutoff unit 531 includes an NMOS tube or a relay.

The cut-off circuit 53 further includes a zener diode 532, a first resistor 533, and a second resistor 534, and the cut-off unit 531 is taken as an NMOS transistor, which includes a source N1, a gate N2, and a drain N3.

With reference to fig. 5, the source N1 of the NMOS transistor is electrically connected to the positive electrode of the power supply terminal 6, the anode of the zener diode 532, and one end of the first resistor 533.

The gate N2 of the NMOS transistor is electrically connected to the cathode of the zener diode 532, the other end of the first resistor 533, and one end of the second resistor 534, respectively.

The drain N3 of the NMOS transistor is electrically connected to the low voltage turn winding 12.

The other end of the second resistor 534 is communicatively connected to the cutoff control module 52. For example, the other end of the second resistor 534 is connected to the cutoff control module 52 through a communication line.

In this embodiment, the cut-off circuit 53 is a cut-off circuit based on the forward direction of the NMOS transistor power supply, and the cut-off circuit 53 can prevent the high voltage generated when the back-end power device, such as the high-voltage steering winding 12, operates (including the operating state and the loading state) from finding to break down the power supply terminal 6 or reversely charge the power supply terminal 6.

When the dual-source motor pump is in a standby state, the high-voltage steering winding 12 in the motor body 1 runs to drive the steering oil pump 2 to work so as to meet the requirement of normal steering, and at the moment, the low-voltage steering winding 11 cannot open the cutoff circuit 53 (which is the normal working condition of the whole vehicle). That is, when the control signal P sent by the low voltage controller 5 is at a low level, the output level of the output terminal of the cut-off control module 52 is opposite to the level of the source N1 of the NMOS transistor, and at this time, the NMOS transistor is in a cut-off state, so that the back-end power device does not affect the power supply terminal 6.

When the whole vehicle runs abnormally, in order to meet the safety and stability of the whole vehicle steering, whether the emergency steering needs to be started or not is determined according to the condition of the rotating speed of the motor. When the vehicle is abnormal and the rotation speed of the motor is reduced to a preset value, for example, the rotation speed of the first rotor assembly in the high-voltage steering winding 12 is reduced to 800RPM from 1500RRM (rev/min), the low-voltage controller 5 sends a control signal P, and the cutoff control module 52 receives the control signal P and then instructs the NMOS to turn on. At this time, the control signal P sent by the low-voltage controller 5 is at a high level, the level transmitted to the gate N2 of the NMOS transistor by the output terminal of the cutoff control module 52 is 10 to 12 volts higher than the level of the source N1 of the NMOS transistor, at this time, the NMOS transistor is in a conducting state, and the power supply terminal 6 can normally supply power to the control circuit a of the motor body 1 and other rear-end power devices. It should be noted that, in order to ensure the timeliness of the emergency steering of the whole vehicle, the emergency response switching time of the dual-source motor pump in the present application is less than 100 ms.

In one example, the cutoff unit 531 may select a relay. It should be noted that, the switching on or off of the relay by the level of the control signal P sent by the low voltage controller 5 may be controlled by the prior art, and is not described herein again.

It is to be noted that, in this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion, so that an article or apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in the article or device comprising the element.

The above embodiments are merely to illustrate the technical solutions of the present invention and not to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made without departing from the spirit and scope of the present invention and it should be understood that the present invention is to be covered by the appended claims.

Claims (10)

1. The double-source motor pump is characterized by comprising a motor body, a steering oil pump and a shell arranged outside the steering oil pump, wherein the steering oil pump and the shell are fixed on the motor body;

the shell with turn to and have the holding chamber between the oil pump, the holding chamber with turn to the inside intercommunication of oil pump, turn to the fluid in the oil pump can enter into in the holding chamber.

2. The dual source motor pump of claim 1, wherein said housing includes an inner wall surface and an outer wall surface, at least one sound dampening gap layer being disposed between said inner wall surface and said outer wall surface.

3. The dual source motor pump of claim 2, wherein said acoustic gap layer is filled with air; alternatively, the first and second electrodes may be,

the sound insulation gap layer is in a vacuum state; or

The sound insulation gap layer is filled with sound insulation materials; or

And nitrogen or inert gas is filled in the sound insulation gap layer.

4. The dual source motor pump of claim 1, wherein said housing includes a housing oil inlet and a housing oil outlet, said steering oil pump includes an oil pump oil inlet and an oil pump oil outlet, said housing oil inlet is in communication with said oil pump oil inlet, and said housing oil outlet is in communication with said oil pump oil outlet;

the shell further comprises an oil return port, and the oil return port is communicated with an external oil can.

5. The dual source motor pump of claim 1 wherein said housing is provided with housing mounting holes, said mounting holes being connected to said motor body by connectors.

6. The dual source motor pump of claim 1, wherein the material of said housing comprises a non-metallic material.

7. The dual-source motor pump of claim 1, further comprising a low-voltage controller, wherein the motor body comprises a low-voltage steering winding, the low-voltage controller is connected to the power supply terminal and the low-voltage steering winding, the low-voltage controller comprises a cutoff module, and the cutoff module is configured to cut off electric energy generated by coupling of the low-voltage steering winding when the high-voltage steering winding operates.

8. The dual source motor pump of claim 7, wherein said low voltage controller further comprises a cutoff control module communicatively coupled to said cutoff module, said cutoff module comprising a cutoff circuit; the low-voltage controller is used for sending a control signal, and the cutoff control module receives the control signal and indicates the cutoff circuit to be switched off or switched on.

9. The dual source motor pump of claim 8, wherein said cutoff circuit comprises a cutoff unit comprising an NMOS tube or relay.

10. The dual source motor pump of claim 9, wherein said cutoff circuit further comprises a zener diode, a first resistor, a second resistor;

the NMOS tube comprises a source electrode, a grid electrode and a drain electrode;

the source electrode is electrically connected with the anode of the power supply end, the anode of the voltage stabilizing diode and one end of the first resistor respectively;

the grid is electrically connected with the cathode of the voltage stabilizing diode, the other end of the first resistor and one end of the second resistor respectively;

the drain electrode is electrically connected with the low-voltage steering winding;

and the other end of the second resistor is in communication connection with the truncation control module.

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